OPTIMIZATION OF THE SWITCHED-RELUCTANCE MOTOR ACTIVE PART BY THE NELDER-MEAD METHOD

The relevance of the work relates to the important practical problems for oil industry, such as improving the efficiency of oil extraction, the reliability of equipment and reduction of operating costs. In this regard, the paper considers the issues of optimization of active part of the switched-reluctance motor, which has several advantages compared to asynchronous motors and synchronous with permanent magnets which are applied in oil industry. The main advantages of the switched-reluctance motor are efficiency and reliability. For further improvement of its specific indicators and economic efficiency the authors have applied the Nelder-Mead method, which allows in the given dimensions increasing the electromagnetic torque of the motor by optimizing the geometry of the active part. It is important for a submersible pump having strict size constraints. At directed drilling of a well with high curvature the application of the motor of this type allows implementing fully its advantages. The main aim of the study is to analyze the basic design techniques for the switched-reluctance drives and to optimize the active part of the switched-reluctance motor for increasing the average value of the electromagnetic torque. The methods used in the study. Magnetic field was calculated by the finite element method, embedded in the program for calculating and visualizing the electromagnetic processes FEMM 4.2; the area under the curve of the electromagnetic torque was calculated by numerical integration of this curve by the method of trapezoids. The authors used the deterministic Nelder-Mead method (simplex), which relates to the methods of unconditional optimization of functions of several variables and does not use the derivative (gradient) function. The results. The authors analyzed the basic methods of designing the switched-reluctance drive and developed the software of automated design of the switched-reluctance motor in MATLAB environment. This software help form the geometrical figures of tooth area of the motor. The magnetic field was calculated in the program FEMM 4.2. The authors implemented the optimization algorithm for calculating the average value of the electromagnetic torque based on the Nelder-Mead method (deformable polyhedron). It allows improving significantly the switched-reluctance motor performance.